Jalapenos or sarranos (sic?). Dice them up. You can leave the seeds in, but they can sometimes get in the way, and anyways its the veins (the white parts) that contain a lot of the heat. I would also suggest you saute them with a little bit of garlic before throwing all the liquid on top.

Add some Thai Red Curry PASTE (a little goes a long way). Also Sriracha hot sauce (found in the Asian section) could be used and added to each individual plate (if you were feed more than just you and others may not like it as spicy).

Bhut jolokia powder...I carry it with me everywhere I go and everything I eat that has meat or eggs gets some. Being full paleo and giving up nightshades would be a very bland world in my book. I won't do it. Deadly nightshades might cause inflammation in some people but "deadly" my ass. The only way they'll kill you is if you choke on one. That's not what I call deadly.